Add option to disable no-config debugging

The way no-config debugging is handled produces issues on certain linux distributions, like NixOS, making the extension unusable.

In the particular issue I'm experiencing, the extension fails to generate a directory:

2026-09-06 15:40:43.556 [error] Activating extension vscjava.vscode-java-debug failed due to an error:
2026-09-06 15:40:43.556 [error] Error: ENOENT: no such file or directory, mkdir '/home/USER/.vscode-oss/extensions/vscjava.vscode-java-debug/.noConfigDebugAdapterEndpoints'
	at Object.mkdirSync (node:fs:1350:26)
	at /nix/store/2adnr1in2fxpjmdbwyp6gjawily2wy4x-vscode-extension-vscjava-vscode-java-debug-0.59.0/share/vscode/extensions/vscjava.vscode-java-debug/dist/extension.js:2:339586
	at Generator.next (<anonymous>)
	at /nix/store/2adnr1in2fxpjmdbwyp6gjawily2wy4x-vscode-extension-vscjava-vscode-java-debug-0.59.0/share/vscode/extensions/vscjava.vscode-java-debug/dist/extension.js:2:338649
	at new Promise (<anonymous>)
	at r (/nix/store/2adnr1in2fxpjmdbwyp6gjawily2wy4x-vscode-extension-vscjava-vscode-java-debug-0.59.0/share/vscode/extensions/vscjava.vscode-java-debug/dist/extension.js:2:338397)
	at t.registerNoConfigDebug (/nix/store/2adnr1in2fxpjmdbwyp6gjawily2wy4x-vscode-extension-vscjava-vscode-java-debug-0.59.0/share/vscode/extensions/vscjava.vscode-java-debug/dist/extension.js:2:338859)
	at /nix/store/2adnr1in2fxpjmdbwyp6gjawily2wy4x-vscode-extension-vscjava-vscode-java-debug-0.59.0/share/vscode/extensions/vscjava.vscode-java-debug/dist/extension.js:2:296042
	at Generator.next (<anonymous>)
	at a (/nix/store/2adnr1in2fxpjmdbwyp6gjawily2wy4x-vscode-extension-vscjava-vscode-java-debug-0.59.0/share/vscode/extensions/vscjava.vscode-java-debug/dist/extension.js:2:290398)

Start by locating the source corresponding to registerNoConfigDebug in the extension and trace where no-config debugging is activated. Review the extension's configuration and activation entry points to determine where a disable option belongs. Done means users can turn off no-config debugging and the extension activates successfully on affected Linux distributions.