Default deploy-in-cluster-ipam-provider to true

[flawedmatrix]

What this PR does / why we need it

Enables the deploy in-cluster ipam provider feature flag by default and remove the beta suffix.

Which issue(s) this PR fixes

Fixes #

Describe testing done for PR

Deployed a management cluster locally and see the caip-in-cluster-controller-manager was deployed successfully and by default.

Release note

The `features.management-cluster.deploy-in-cluster-ipam-provider` feature flag is now enabled by default.

Additional information

Special notes for your reviewer

[flawedmatrix]

/test install-vc7

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/4155/20221213001051/clustergen.diff.txt
Author/reviewers:
Please review to verify that the effects on the generated cluster configurations are exactly what the PR intended, and give a thumbs-up if so.

[alfredthenarwhal]

@flawedmatrix: /test install-vc7
Commit: 1e96e1e

Build failed! Build no: 3571

[christianang]

/test install-vc7

[alfredthenarwhal]

@christianang: /test install-vc7
Commit: 1e96e1e

Build failed! Build no: 3586

[github-actions]

Cluster Generation A/B Results:
https://storage.googleapis.com/tkg-clustergen/4155/20221213182551/clustergen.diff.txt
Author/reviewers:
Please review to verify that the effects on the generated cluster configurations are exactly what the PR intended, and give a thumbs-up if so.

[codecov]

Codecov Report

Merging #4155 (c3dc0f4) into main (bf4d2b4) will decrease coverage by 0.88%.
The diff coverage is 72.83%.

@@            Coverage Diff             @@
##             main    #4155      +/-   ##
==========================================
- Coverage   48.67%   47.78%   -0.89%     
==========================================
  Files         446      476      +30     
  Lines       44279    46399    +2120     
==========================================
+ Hits        21553    22172     +619     
- Misses      20686    22135    +1449     
- Partials     2040     2092      +52     

Impacted Files	Coverage Δ
...i/plugin/isolated-cluster/imageop/client_imgpkg.go	0.00% <0.00%> (ø)
...gin/isolated-cluster/imageop/publishimagestotar.go	59.69% <74.68%> (ø)
cmd/cli/plugin/tkr/v1alpha3/os.go	73.50% <0.00%> (-0.86%)	⬇️
cmd/cli/plugin/isolated-cluster/main.go	0.00% <0.00%> (ø)
cmd/cli/plugin/cluster/available_upgrade.go	16.32% <0.00%> (ø)
cmd/cli/plugin/cluster/machinehealthcheck.go	100.00% <0.00%> (ø)
cmd/cli/plugin/cluster/upgrade.go	58.94% <0.00%> (ø)
cmd/cli/plugin/cluster/set_node_pool.go	14.63% <0.00%> (ø)
cmd/cli/plugin/cluster/list.go	11.36% <0.00%> (ø)
cmd/cli/plugin/cluster/set_machinehealthcheck.go	23.33% <0.00%> (ø)
... and 24 more

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[christianang]

/test install-vc7

[alfredthenarwhal]

@christianang: /test install-vc7
Commit: c3dc0f4

Tests failed! Build no: 3591

[imikushin]

LGTM