Add RepositorySetParametersCommand

[KastenMike]

It's a command missing from command/repository.go. Added an initial start with the retention settings.
Also added related params to the create repository https://kopia.io/docs/reference/command-line/common/repository-create-azure/

$HOME/bin/kopia --log-level=error --config-file=/tmp/kopia-repository.config --log-dir=/tmp/kopia-log --password=myPass repository set-parameters --retention-mode=Locked --retention-period=72h0m0s
putblob mode: Locked and retention 72h0m0s...
putblob mode: Locked and retention 72h0m0s...

$HOME/bin/kopia --log-level=error --config-file=/tmp/kopia-repository.config --log-dir=/tmp/kopia-log --password=myPass repository set-parameters --retention-mode=Locked --retention-period=54h0m0s
putblob mode: Locked and retention 54h0m0s...
putblob mode: Locked and retention 54h0m0s...

$HOME/bin/kopia --log-level=error --config-file=/tmp/kopia-repository.config --log-dir=/tmp/kopia-log --password=myPass repository set-parameters --retention-mode=COMPLIANCE --retention-period=54h0m0s
ERROR error updating repository parameters: error setting parameters: unable to write blobcfg blob: PutBlob() failed for "kopia.blobcfg": blob retention mode is not valid for Azure: unsupported put-blob option

[viveksinghggits]

what happens if someone provides this flag with non create command?

[KastenMike]

The fields are not used in RepositoryConnectCommand. The same way PITFlag is used in Connect but not in Create

[viveksinghggits]

@KastenMike can you please share how things look with new subcommand and any test plan. It would be easier to approve the PR.

[KastenMike]

@KastenMike can you please share how things look with new subcommand and any test plan. It would be easier to approve the PR.

What do you mean? There are unit tests in the PR

The changes are based on
https://kopia.io/docs/reference/command-line/common/repository-set-parameters/
https://kopia.io/docs/reference/command-line/common/repository-create-s3/

[KastenMike]

@KastenMike can you please share how things look with new subcommand and any test plan. It would be easier to approve the PR.

e.g.

$HOME/bin/kopia --log-level=error --config-file=/tmp/kopia-repository.config --log-dir=/tmp/kopia-log --password=myPass repository set-parameters --retention-mode=Locked --retention-period=72h0m0s
putblob mode: Locked and retention 72h0m0s...
putblob mode: Locked and retention 72h0m0s...

$HOME/bin/kopia --log-level=error --config-file=/tmp/kopia-repository.config --log-dir=/tmp/kopia-log --password=myPass repository set-parameters --retention-mode=Locked --retention-period=54h0m0s
putblob mode: Locked and retention 54h0m0s...
putblob mode: Locked and retention 54h0m0s...

$HOME/bin/kopia --log-level=error --config-file=/tmp/kopia-repository.config --log-dir=/tmp/kopia-log --password=myPass repository set-parameters --retention-mode=COMPLIANCE --retention-period=54h0m0s
ERROR error updating repository parameters: error setting parameters: unable to write blobcfg blob: PutBlob() failed for "kopia.blobcfg": blob retention mode is not valid for Azure: unsupported put-blob option