Resolves #380.

feat(storage/driver/s3-aws): add IRSA auth support

See merge request !607

fix(handlers): handle blob not found errors when serving head requests

See merge request !724

perf(handlers): lookup single blob link instead of looping over all

See merge request !725

build: allow lightweight tags to be used for registry version

See merge request !727

feat(datastore): allow removing a connection from the pool after being idle for a period of time

See merge request !728

fix(handlers): enable cross repository blob mounts without FS mirroring

See merge request !726

fix(storage): never write blob links when FS mirroring is disabled

See merge request !718

fix(handlers): deny pushes for manifest lists with blob references except manifest cache images

See merge request !729

# [3.8.0](v3.7.0-gitlab...v3.8.0-gitlab) (2021-08-17)

### Bug Fixes

* **handlers:** deny pushes for manifest lists with blob references except manifest cache images ([79e854aa](79e854aa))
* **handlers:** enable cross repository blob mounts without FS mirroring ([98fe521b](98fe521b))
* **handlers:** handle blob not found errors when serving head requests ([2492b4e4](2492b4e4))
* **storage:** never write blob links when FS mirroring is disabled ([0786b775](0786b775))

### Features

* **datastore:** allow removing a connection from the pool after being idle for a period of time ([0352cc3f](0352cc3f))
* **storage/driver/s3-aws:** add IRSA auth support ([de693316](de693316))

### Performance Improvements

* **handlers:** lookup single blob link instead of looping over all ([46f16420](46f16420))