fix(executor): mark pool backend experimental, auto selects ephemeral - #3146

Running Vale across on the following files affected by this PR:

- self-hosting/kubernetes.mdx
- self-hosting/security.mdx
- snippets/environment-variables.mdx

Attempting to initialize Vale linter...
No customer vale configuration detected. Using Mintlify's default configuration.
Attempting to run Vale spellcheck...
Vale spellcheck completed successfully.

docs/self-hosting/kubernetes.mdx:
	- 3:34       Did you really mean 'Tracecat'?
	- 3:90       Did you really mean 'Tracecat'?
	- 3:141      Did you really mean 'conformant'?
	- 7:7        Did you really mean 'Tracecat'?
	- 16:17      Did you really mean 'Tracecat'?
	- 18:54      Did you really mean 'Memorystore'?
	- 24:1       Did you really mean 'Tracecat'?
	- 30:67      Did you really mean 'Tracecat'?
	- 92:15      Did you really mean 'plaintext'?
	- 169:35     Did you really mean 'subchart'?
	- 194:25     Did you really mean 'subchart'?
	- 194:67     Did you really mean 'namespace'?
	- 212:184    Did you really mean 'litellm'?
	- 241:43     Did you really mean 'Istio'?
	- 342:18     Did you really mean 'tracecat'?
	- 342:52     Did you really mean 'tracecat'?
	- 354:11     Did you really mean 'Tracecat'?
	- 379:15     Did you really mean 'sandboxing'?
	- 381:19     Did you really mean 'nsjail'?
	- 381:80     Did you really mean 'nsjail'?
	- 389:1      Did you really mean 'nsjail'?
	- 389:81     Did you really mean 'seccomp'?
	- 397:4      Did you really mean 'Autoscaling'?
	- 402:43     Did you really mean 'subchart'?
	- 427:6      Did you really mean 'autoscaling'?
	- 445:27     Did you really mean 'burstable'?
	- 451:28     Did you really mean 'subcharts'?
	- 451:54     Did you really mean 'Grafana'?
	- 451:67     Did you really mean 'Grafana'?
	- 470:5      Did you really mean 'Grafana'?
	- 473:104    Did you really mean 'Tracecat'?

docs/self-hosting/security.mdx:
	- 3:39      Did you really mean 'Tracecat'?
	- 8:155     Did you really mean 'Tracecat'?
	- 37:14     Did you really mean 'sandboxing'?
	- 39:1      Did you really mean 'Tracecat'?
	- 42:15     Did you really mean 'Tracecat'?
	- 42:143    Did you really mean 'subprocesses'?
	- 45:9      Did you really mean 'namespace'?
	- 47:55     Did you really mean 'namespace'?
	- 49:5      Did you really mean 'nsjail'?
	- 55:10     Did you really mean 'namespace'?
	- 56:134    Did you really mean 'namespace'?
	- 58:11     Did you really mean 'nsjail'?
	- 65:1      Did you really mean 'nsjail'?
	- 68:7      Did you really mean 'nsjail'?
	- 68:33     Did you really mean 'rootfs'?
	- 68:53     Did you really mean 'Tracecat'?
	- 71:3      Did you really mean 'nsjail'?
	- 71:107    Did you really mean 'namespace'?
	- 78:18     Did you really mean 'namespace'?
	- 79:17     Did you really mean 'nsjail'?
	- 87:173    Did you really mean 'CAs'?

docs/snippets/environment-variables.mdx:
	- 6:98      Did you really mean 'Tracecat'?
	- 7:67      Did you really mean 'Tracecat'?
	- 18:143    Did you really mean 'ngrok'?
	- 34:79     Did you really mean 'superadmin'?
	- 65:56     Did you really mean 'namespace'?
	- 72:93     Did you really mean 'subprocess'?
	- 72:142    Did you really mean 'nsjail'?
	- 72:149    Did you really mean 'subprocess'?
	- 72:221    Did you really mean 'nsjail'?
	- 73:49     Did you really mean 'nsjail'?
	- 73:56     Did you really mean 'sandboxing'?
	- 73:91     Did you really mean 'nsjail'?
	- 98:34     Did you really mean 'hostname'?


Found 65 suggested changes across 3 files in 535.08ms