refactor(pkg/test): split logic in pkg/test/common.go into multiple packages

[andaaron]

Which could be imported independently. See more details:

1. "zotregistry.io/zot/pkg/test/common" - currently used as
   tcommon "zotregistry.io/zot/pkg/test/common" - inside pkg/test
   test "zotregistry.io/zot/pkg/test/common" - in tests
   . "zotregistry.io/zot/pkg/test/common" - in tests
   Decouple zb from code in test/pkg in order to keep the size small.

2. "zotregistry.io/zot/pkg/test/image-utils" - curently used as
   . "zotregistry.io/zot/pkg/test/image-utils"

3. "zotregistry.io/zot/pkg/test/deprecated" - curently used as
   "zotregistry.io/zot/pkg/test/deprecated"
   This one will bre replaced gradually by image-utils in the future.

4. "zotregistry.io/zot/pkg/test/signature" - (cosign + notation) use as
   "zotregistry.io/zot/pkg/test/signature"

5. "zotregistry.io/zot/pkg/test/auth" - (bearer + oidc) curently used as
   authutils "zotregistry.io/zot/pkg/test/auth"

6. "zotregistry.io/zot/pkg/test/oci-utils" - curently used as
   ociutils "zotregistry.io/zot/pkg/test/oci-utils"

Some unused functions were removed, some were replaced, and in
a few cases specific functions were moved to the files they were used in.

Added an interface for the StoreController, this reduces the number of imports
of the entire image store, decreasing binary size for tests.
If the zb code was still coupled with pkg/test, this would have reflected in zb size.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #1861 (ae1a49b) into main (92e382c) will increase coverage by 0.03%.
The diff coverage is 85.73%.

@@            Coverage Diff             @@
##             main    #1861      +/-   ##
==========================================
+ Coverage   92.03%   92.07%   +0.03%     
==========================================
  Files         146      152       +6     
  Lines       26465    26445      -20     
==========================================
- Hits        24358    24350       -8     
+ Misses       1556     1547       -9     
+ Partials      551      548       -3     

Files	Coverage Δ
pkg/compliance/v1_0_0/check.go	99.10% <100.00%> (ø)
pkg/storage/storage_controller.go	100.00% <100.00%> (ø)
pkg/test/auth/bearer.go	90.47% <ø> (ø)
pkg/test/image-utils/upload.go	83.51% <100.00%> (ø)
pkg/test/oci-utils/oci_layout.go	91.07% <100.00%> (ø)
pkg/test/oci-utils/repo.go	100.00% <ø> (ø)
pkg/test/oci-utils/store.go	100.00% <100.00%> (ø)
pkg/test/auth/oidc.go	88.00% <88.00%> (ø)
pkg/test/common/utils.go	91.01% <93.05%> (+20.04%)	⬆️
pkg/test/image-utils/utils.go	89.78% <90.19%> (+0.12%)	⬆️
... and 5 more

... and 1 file with indirect coverage changes

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[rchincha]

lgtm