Extract raw shell/bash scripts as actual shell script files (#751)

### Description of the change

This is a preparation for #724 (bash script testing) which would be too complex to review if done there. I haven't changed the script contents.

### Benefits

Better IDE support, possibility for shell checks, tests.

### Possible drawbacks

-

### Additional information

I only extracted files that are native bash scripts. There are others, being a mix of Helm templating and shell scripts. Those scripts must be cleared first before extracting them as well.

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/751
Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Co-committed-by: justusbunsi <sk.bunsenbrenner@gmail.com>

scripts/act_runner/token.sh

@@ -0,0 +1,43 @@
+#!/bin/sh
+
+set -eu
+
+timeout_delay=15
+
+check_token() {
+  set +e
+
+  echo "Checking for existing token..."
+  token="$(kubectl get secret "$SECRET_NAME" -o jsonpath="{.data['token']}" 2> /dev/null)"
+  [ $? -ne 0 ] && return 1
+  [ -z "$token" ] && return 2
+  return 0
+}
+
+create_token() {
+  echo "Waiting for new token to be generated..."
+  begin=$(date +%s)
+  end=$((begin + timeout_delay))
+  while true; do
+    [ -f /data/actions/token ] && return 0
+    [ "$(date +%s)" -gt $end ] && return 1
+    sleep 5
+  done
+}
+
+store_token() {
+  echo "Storing the token in Kubernetes secret..."
+  kubectl patch secret "$SECRET_NAME" -p "{\"data\":{\"token\":\"$(base64 /data/actions/token | tr -d '\n')\"}}"
+}
+
+if check_token; then
+  echo "Key already in place, exiting."
+  exit
+fi
+
+if ! create_token; then
+  echo "Checking for an existing act runner token in secret $SECRET_NAME timed out after $timeout_delay"
+  exit 1
+fi
+
+store_token