fix(glob): do not treat custom schema as special

[yury-s]

new URL() adds / after the domain if:

• the scheme is a special scheme per WHATWG spec: http, https, ftp, file, ws, wss, and
• no explicit path was provided.

Aftter this PR: preserve explicit scheme to avoid inadvertent slash. Treat any scheme pattern as a special scheme for the slash resolution.

Fixes #37821

[github-actions]

Test results for "MCP"

2550 passed, 102 skipped

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Merge workflow run.

[github-actions]

Test results for "tests 1"

1 failed
❌ [playwright-test] › runner.spec.ts:118 › should ignore subprocess creation error because of SIGINT @macos-latest-node18-1

3 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1079 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node18`
⚠️ [firefox-page] › page/page-event-request.spec.ts:182 › should return response body when Cross-Origin-Opener-Policy is set `@firefox-ubuntu-22.04-node18`
⚠️ [chromium-library] › library/proxy.spec.ts:93 › should proxy local network requests › with other bypasses › link-local `@ubuntu-22.04-chromium-tip-of-tree`

47017 passed, 816 skipped

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Merge workflow run.