fix(sdk): support LoadBalancer exposeType in ExposedMonopod

[pandatix]

Fixes #906 lack of propagation on kubernetes.ExposedMonopod.

Also, (*ExposedMonopod).defaults was actually not used so I removed it.

[github-actions]

The latest Buf updates on your PR. Results from workflow CI / buf-lint (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Sep 1, 2025, 6:54 PM

[coveralls]

Pull Request Test Coverage Report for Build 17385272946

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 6 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.02%) to 52.063%

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Files with Coverage Reduction	New Missed Lines	%
cmd/chall-manager-janitor/main.go	6	78.04%

Totals
Change from base Build 17361322564:	-0.02%
Covered Lines:	4379
Relevant Lines:	8411

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💛 - Coveralls