fix: validate-values script

[mikhail-klimko]

What

Fix validate-values script to store kubectl get svc output in a file.

Why

kubectl.kubernetes.io/last-applied-configuration might contain unescaped new lines causing jq to fail when service_info saved to an env var

echo $service_info | jq -r '.items'
jq: parse error: Invalid string: control characters from U+0000 through U+001F must be escaped at line 10, column 1

Notes

[mikhail-klimko]

/e2e

[mikhail-klimko]

/e2e