proxy: make TLS and WS handling optional

[conradludgate]

Problem

#8736 is getting too big. splitting off some simple changes here

Summary of changes

Local proxy wont always be using tls, so make it optional. Local proxy wont be using ws for now, so make it optional. Remove a dead config var.

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• Do we need to implement analytics? if so did you add the relevant metrics to the dashboard?
• If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section.

Checklist before merging

• Do not forget to reformat commit message to not include the above checklist

[github-actions]

2172 tests run: 2108 passed, 0 failed, 64 skipped (full report)

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Flaky tests (4)

Postgres 16

• test_combocid: debug
• test_forward_compatibility: debug
• test_layer_bloating: debug
• test_lfc_resize: debug

Code coverage* (full report)

• functions: 32.4% (7236 of 22307 functions)
• lines: 50.4% (58431 of 115933 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
96898f4 at 2024-08-20T13:05:40.521Z :recycle:}