fix: quote the repl so preflight can run standalone

[nate-credoai]

What this PR does / why we need it:

This simply adds single quotes around the address value in pkg/preflight/assets/host-preflights.yaml so it can be run in standalone mode as described here: https://community.replicated.com/t/kurl-how-to-do-a-standalone-run-of-host-preflights/782

setup

$ curl -sL https://github.com/replicatedhq/troubleshoot/releases/latest/download/preflight_linux_amd64.tar.gz | tar xzvf -
LICENSE
README.md
key.pub
troubleshoot-sbom.tgz
troubleshoot-sbom.tgz.sig
preflight

before

$ curl -sO https://raw.githubusercontent.com/replicatedhq/kURL/main/pkg/preflight/assets/host-preflights.yaml
$ md5sum host-preflights.yaml
f055284b83bd0fe513fbaa02819b305f  host-preflights.yaml
$ sudo ./preflight host-preflights.yaml
Warning: no preflight or host preflight spec was found

after

$ curl -s -O https://raw.githubusercontent.com/nate-credoai/kURL/fix/host-preflights-asset/pkg/preflight/assets/host-preflights.yaml
$ md5sum host-preflights.yaml
6584ab719a5eb9cc9a3e58a974826499  host-preflights.yaml
$ sudo ./preflight host-preflights.yaml
 * [TCP Port Status] Running collector...
 * [CPU Info] Running collector...
 * [Amount of Memory] Running collector...
 * [Block Devices] Running collector...
 * [Host OS Info] Running collector...
 [...]

diff

$ diff -u host-preflights.yaml.old host-preflights.yaml.new
--- host-preflights.yaml.old	2023-12-29 04:16:43.943708099 +0000
+++ host-preflights.yaml.new	2023-12-29 04:16:53.119712945 +0000
@@ -32,7 +32,7 @@
     - tcpLoadBalancer:
         collectorName: "Kubernetes API Server Load Balancer"
         port: 6443
-        address: {{kurl .Installer.Spec.Kubernetes.LoadBalancerAddress }}
+        address: '{{kurl .Installer.Spec.Kubernetes.LoadBalancerAddress }}'
         timeout: 3m
         # ha and is first master (primary and not join) and not is upgrade
         exclude: '{{kurl and .Installer.Spec.Kubernetes.Version .Installer.Spec.Kubernetes.LoadBalancerAddress .IsPrimary (not .IsJoin) (not .IsUpgrade) | not }}'

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

• I'm assuming this should be possible and that address should be a string which seems obvious.
• I'm not sure if this asset originates from another repo that might need updating.
• My understanding is that this is the minimum host preflights that kurl will run if they are not overridden.

Steps to reproduce

$ curl -sL https://github.com/replicatedhq/troubleshoot/releases/latest/download/preflight_linux_amd64.tar.gz | tar xzvf -
LICENSE
README.md
key.pub
troubleshoot-sbom.tgz
troubleshoot-sbom.tgz.sig
preflight
$ curl -sO https://raw.githubusercontent.com/replicatedhq/kURL/main/pkg/preflight/assets/host-preflights.yaml
$ md5sum host-preflights.yaml
f055284b83bd0fe513fbaa02819b305f  host-preflights.yaml
$ sudo ./preflight host-preflights.yaml
Warning: no preflight or host preflight spec was found

Does this PR introduce a user-facing change?

NONE

Does this PR require documentation?

NONE

[laverya]

Well, there's a lot of checks that won't run properly in this scenario (because the intended values haven't been templated in, like the load balancer address here) but I don't see any reason not to do this!