[POC] Allow clients to specify set TLS specifications per-request

[jrhee17]

Motivation:

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Modifications:

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Result:

• Closes #. (If this resolves the issue.)
• Describe the consequences that a user will face after this PR is merged.

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[github-actions]

🔍 Build Scan® (commit: d4c99af)

Job name	Status	Build Scan®
build-ubicloud-standard-16-jdk-8	✅	https://ge.armeria.dev/s/jvlfyagplvlly
build-ubicloud-standard-16-jdk-21-snapshot-blockhound	❌ (failure)	https://ge.armeria.dev/s/7ivrtqbwsewo2
build-ubicloud-standard-16-jdk-17-min-java-17-coverage	❌ (failure)	https://ge.armeria.dev/s/7h756kul6cewa
build-ubicloud-standard-16-jdk-17-min-java-11	✅	https://ge.armeria.dev/s/7ybzxvlj66f66
build-ubicloud-standard-16-jdk-17-leak	❌ (failure)	https://ge.armeria.dev/s/vnguthm34uafe
build-ubicloud-standard-16-jdk-11	✅	https://ge.armeria.dev/s/gxxg5nndrftr2
build-macos-latest-jdk-21	✅	https://ge.armeria.dev/s/7f3gcapv4rlle

[codecov]

Codecov Report

❌ Patch coverage is 80.72855% with 164 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.20%. Comparing base (8150425) to head (ea6d7cf).
⚠️ Report is 248 commits behind head on main.

Files with missing lines	Patch %	Lines
...rmeria/internal/common/util/SignedCertificate.java	70.13%	36 Missing and 7 partials ⚠️
...p/armeria/internal/common/util/SslContextUtil.java	80.20%	11 Missing and 8 partials ⚠️
...ava/com/linecorp/armeria/server/ServerTlsSpec.java	70.27%	6 Missing and 5 partials ⚠️
...om/linecorp/armeria/client/HttpClientDelegate.java	79.16%	4 Missing and 6 partials ⚠️
...a/com/linecorp/armeria/common/AbstractTlsSpec.java	80.85%	1 Missing and 8 partials ⚠️
...nternal/common/util/VerifierBasedTrustManager.java	62.50%	6 Missing and 3 partials ⚠️
...meria/common/InsecureHostsPeerVerifierFactory.java	60.00%	6 Missing and 2 partials ⚠️
.../linecorp/armeria/server/VirtualHostTlsSetter.java	86.04%	1 Missing and 5 partials ⚠️
...ting/junit5/server/SignedCertificateExtension.java	75.00%	4 Missing and 2 partials ⚠️
.../junit5/server/SelfSignedCertificateExtension.java	28.57%	5 Missing ⚠️
... and 17 more

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6516      +/-   ##
============================================
- Coverage     74.46%   74.20%   -0.27%     
- Complexity    22234    23445    +1211     
============================================
  Files          1963     2110     +147     
  Lines         82437    87666    +5229     
  Branches      10764    11500     +736     
============================================
+ Hits          61385    65050    +3665     
- Misses        15918    17126    +1208     
- Partials       5134     5490     +356     

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