Add a storage layer for attachments (#11387)

* Add a storage layer for attachments

* Fix some bug

* fix test

* Fix copyright head and lint

* Fix bug

* Add setting for minio and flags for migrate-storage

* Add documents

* fix lint

* Add test for minio store type on attachments

* fix test

* fix test

* Apply suggestions from code review

Co-authored-by: guillep2k <18600385+guillep2k@users.noreply.github.com>

* Add warning when storage migrated successfully

* Fix drone

* fix test

* rebase

* Fix test

* display the error on console

* Move minio test to amd64 since minio docker don't support arm64

* refactor the codes

* add trace

* Fix test

* remove log on xorm

* Fi download bug

* Add a storage layer for attachments

* Add setting for minio and flags for migrate-storage

* fix lint

* Add test for minio store type on attachments

* Apply suggestions from code review

Co-authored-by: guillep2k <18600385+guillep2k@users.noreply.github.com>

* Fix drone

* fix test

* Fix test

* display the error on console

* Move minio test to amd64 since minio docker don't support arm64

* refactor the codes

* add trace

* Fix test

* Add URL function to serve attachments directly from S3/Minio

* Add ability to enable/disable redirection in attachment configuration

* Fix typo

* Add a storage layer for attachments

* Add setting for minio and flags for migrate-storage

* fix lint

* Add test for minio store type on attachments

* Apply suggestions from code review

Co-authored-by: guillep2k <18600385+guillep2k@users.noreply.github.com>

* Fix drone

* fix test

* Fix test

* display the error on console

* Move minio test to amd64 since minio docker don't support arm64

* don't change unrelated files

* Fix lint

* Fix build

* update go.mod and go.sum

* Use github.com/minio/minio-go/v6

* Remove unused function

* Upgrade minio to v7 and some other improvements

* fix lint

* Fix go mod

Co-authored-by: guillep2k <18600385+guillep2k@users.noreply.github.com>
Co-authored-by: Tyler <tystuyfzand@gmail.com>

vendor/modules.txt

@@ -457,6 +457,8 @@ github.com/jbenet/go-context/io
 github.com/jessevdk/go-flags
 # github.com/jmhodges/levigo v1.0.0
 ## explicit
+# github.com/json-iterator/go v1.1.10
+github.com/json-iterator/go
 # github.com/kballard/go-shellquote v0.0.0-20170619183022-cd60e84ee657
 ## explicit
 github.com/kballard/go-shellquote
@@ -486,6 +488,8 @@ github.com/klauspost/compress/huff0
 github.com/klauspost/compress/snappy
 github.com/klauspost/compress/zstd
 github.com/klauspost/compress/zstd/internal/xxhash
+# github.com/klauspost/cpuid v1.3.1
+github.com/klauspost/cpuid
 # github.com/klauspost/pgzip v1.2.1
 github.com/klauspost/pgzip
 # github.com/kr/pretty v0.1.0
@@ -565,11 +569,32 @@ github.com/mholt/archiver/v3
 # github.com/microcosm-cc/bluemonday v1.0.3-0.20191119130333-0a75d7616912
 ## explicit
 github.com/microcosm-cc/bluemonday
+# github.com/minio/md5-simd v1.1.0
+github.com/minio/md5-simd
+# github.com/minio/minio-go/v7 v7.0.4
+## explicit
+github.com/minio/minio-go/v7
+github.com/minio/minio-go/v7/pkg/credentials
+github.com/minio/minio-go/v7/pkg/encrypt
+github.com/minio/minio-go/v7/pkg/lifecycle
+github.com/minio/minio-go/v7/pkg/notification
+github.com/minio/minio-go/v7/pkg/replication
+github.com/minio/minio-go/v7/pkg/s3utils
+github.com/minio/minio-go/v7/pkg/set
+github.com/minio/minio-go/v7/pkg/signer
+github.com/minio/minio-go/v7/pkg/sse
+github.com/minio/minio-go/v7/pkg/tags
+# github.com/minio/sha256-simd v0.1.1
+github.com/minio/sha256-simd
 # github.com/mitchellh/go-homedir v1.1.0
 ## explicit
 github.com/mitchellh/go-homedir
 # github.com/mitchellh/mapstructure v1.1.2
 github.com/mitchellh/mapstructure
+# github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd
+github.com/modern-go/concurrent
+# github.com/modern-go/reflect2 v1.0.1
+github.com/modern-go/reflect2
 # github.com/mrjones/oauth v0.0.0-20180629183705-f4e24b6d100c
 github.com/mrjones/oauth
 # github.com/mschoch/smat v0.2.0
@@ -635,6 +660,8 @@ github.com/quasoft/websspi
 github.com/quasoft/websspi/secctx
 # github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001
 ## explicit
+# github.com/rs/xid v1.2.1
+github.com/rs/xid
 # github.com/sergi/go-diff v1.1.0
 ## explicit
 github.com/sergi/go-diff/diffmatchpatch
@@ -772,16 +799,18 @@ golang.org/x/crypto/ssh/knownhosts
 # golang.org/x/mod v0.3.0
 golang.org/x/mod/module
 golang.org/x/mod/semver
-# golang.org/x/net v0.0.0-20200625001655-4c5254603344
+# golang.org/x/net v0.0.0-20200707034311-ab3426394381
 ## explicit
 golang.org/x/net/context
 golang.org/x/net/context/ctxhttp
 golang.org/x/net/html
 golang.org/x/net/html/atom
 golang.org/x/net/html/charset
+golang.org/x/net/http/httpguts
 golang.org/x/net/idna
 golang.org/x/net/internal/socks
 golang.org/x/net/proxy
+golang.org/x/net/publicsuffix
 # golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 ## explicit
 golang.org/x/oauth2
@@ -789,7 +818,7 @@ golang.org/x/oauth2/google
 golang.org/x/oauth2/internal
 golang.org/x/oauth2/jws
 golang.org/x/oauth2/jwt
-# golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1
+# golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
 ## explicit
 golang.org/x/sys/cpu
 golang.org/x/sys/internal/unsafeheader
@@ -797,7 +826,7 @@ golang.org/x/sys/unix
 golang.org/x/sys/windows
 golang.org/x/sys/windows/svc
 golang.org/x/sys/windows/svc/debug
-# golang.org/x/text v0.3.2
+# golang.org/x/text v0.3.3
 ## explicit
 golang.org/x/text/encoding
 golang.org/x/text/encoding/charmap
@@ -904,7 +933,7 @@ gopkg.in/asn1-ber.v1
 # gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
 ## explicit
 gopkg.in/gomail.v2
-# gopkg.in/ini.v1 v1.52.0
+# gopkg.in/ini.v1 v1.57.0
 ## explicit
 gopkg.in/ini.v1
 # gopkg.in/ldap.v3 v3.0.2