Fix cloning with Azure DevOps Git

[tomkennedy513]

• remove multi_ack and multi_ack_detailed from unsupported capabilities
• see https://github.com/go-git/go-git/blob/52c2972976737a00fce91d7deb1278a6a460cae6/_examples/azure_devops/main.go\#L21-L36 for more info
• we should be able to remove this once go-git implements full support for v2 git with multi_ack

fixes #1336

[codecov-commenter]

Codecov Report

Merging #1337 (2a2a526) into main (4d30b2a) will increase coverage by 0.02%.
Report is 3 commits behind head on main.
The diff coverage is 94.73%.

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@@            Coverage Diff             @@
##             main    #1337      +/-   ##
==========================================
+ Coverage   67.41%   67.43%   +0.02%     
==========================================
  Files         133      133              
  Lines        8093     8098       +5     
==========================================
+ Hits         5456     5461       +5     
  Misses       2200     2200              
  Partials      437      437              

Files	Coverage Δ
pkg/blob/fetch.go	58.90% <100.00%> (ø)
pkg/cnb/build_metadata.go	57.89% <100.00%> (ø)
pkg/cnb/env_vars.go	84.00% <100.00%> (ø)
pkg/dockercreds/parse_secrets.go	59.21% <100.00%> (ø)
pkg/git/fetch.go	63.63% <100.00%> (+2.98%)	⬆️
pkg/registry/fetch.go	49.61% <100.00%> (ø)
pkg/secret/volume_secret_reader.go	67.56% <100.00%> (ø)
pkg/notary/repository.go	0.00% <0.00%> (ø)