revert(secrets): drop the digit constraint on generated passwords

Slots only need to be independent of each other, which the \b anchoring in the
RANDOMIZED* replacers already guarantees. Constraining the character mix was
solving a different problem than the one asked for.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

scripts/config/password/password_generate.sh

@@ -1,29 +1,11 @@
 #!/bin/bash
 
-generateRandomPassword()
+generateRandomPassword() 
 {
     local password=""
     local length=${CFG_GENERATED_PASS_LENGTH:-20}  # Default to 20 if not set
-    local attempt
-
-    # Letters and numbers only, no special characters: these values are embedded
-    # in connection URLs (Mattermost's Postgres DSN), interpolated into container
-    # entrypoints and written into YAML, and a symbol would need different
-    # escaping in each.
-    #
-    # Retry until the result carries at least one digit AND one letter. base64 of
-    # urandom is alphanumeric but says nothing about the mix — measured over 2000
-    # draws at the default length, 1 in 40 came back with no digit at all, which
-    # trips any policy that requires one. At that hit rate the retry is free.
-    # Bounded rather than `while true` so a pathological length (or an empty
-    # /dev/urandom read) can't spin forever; a sub-2 length can't hold both
-    # classes at all, so it is accepted as-is.
-    for attempt in {1..50}; do
-        password=$(dd if=/dev/urandom bs=64 count=1 2>/dev/null | base64 | tr -d '+/=' | head -c $length)
-        [[ ${#password} -eq $length ]] || continue
-        [[ $length -lt 2 ]] && break
-        [[ "$password" == *[0-9]* && "$password" == *[A-Za-z]* ]] && break
-    done
-
+    
+    # Generate password with letters and numbers only (no special chars)
+    password=$(dd if=/dev/urandom bs=64 count=1 2>/dev/null | base64 | tr -d '+/=' | head -c $length)
     echo "$password"
 }