[tls] fix servername

[cirospaciari]

No description provided.

[github-actions]

❌ @cirospaciari 3 files with test failures on linux-x64:

• test/cli/install/bun-run.test.ts
• test/js/node/watch/fs.watch.test.js
• test/js/third_party/nodemailer/nodemailer.test.ts

View test output

^{#88c197b3125e295c737265f2d769e1042fd60691}

[github-actions]

❌ @cirospaciari 3 files with test failures on linux-x64-baseline:

• test/cli/install/bun-run.test.ts
• test/js/node/watch/fs.watch.test.js
• test/js/third_party/nodemailer/nodemailer.test.ts

View test output

^{#88c197b3125e295c737265f2d769e1042fd60691}

[github-actions]

❌ @cirospaciari 7 files with test failures on bun-darwin-aarch64:

• test/cli/install/bun-run.test.ts
• test/js/bun/net/socket.test.ts
• test/js/bun/spawn/spawn.test.ts
• test/js/bun/test/test-test.test.ts
• test/js/node/watch/fs.watch.test.js
• test/js/web/fetch/fetch-leak.test.js
• test/regression/issue/00631.test.ts

View test output

^{#88c197b3125e295c737265f2d769e1042fd60691}

[github-actions]

❌ @cirospaciari 10 files with test failures on bun-darwin-x64-baseline:

• test/cli/install/bun-run.test.ts
• test/js/bun/spawn/spawn-streaming-stdin.test.ts
• test/js/bun/spawn/spawn-streaming-stdout.test.ts
• test/js/bun/spawn/spawn.test.ts
• test/js/bun/sqlite/sqlite.test.js
• test/js/bun/util/sleepSync.test.ts
• test/js/third_party/nodemailer/nodemailer.test.ts
• test/js/third_party/webpack/webpack.test.ts
• test/js/web/fetch/fetch-leak.test.js
• test/js/web/timers/setTimeout.test.js

View test output

^{#88c197b3125e295c737265f2d769e1042fd60691}

[Jarred-Sumner]

In the future we can use .toBunString() and then server_name and then store the ZigString.Slice which would lazily become a UTF-8 string if necessary or otherwise skip the duplication