Handle kernel parameters with = in their value: (#207)

## Description


Handle kernel parameters with `=` in their value. This enables kernel parameters to be correctly parsed.

## Why is this needed



Fixes: #

## How Has This Been Tested?





## How are existing users impacted? What migration steps/scripts do we need?





## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

Author: mergify[bot]

hook-bootkit/main.go

@@ -247,7 +247,7 @@ func removeTinkWorkerContainer(ctx context.Context, cli *client.Client) error {
 // https://github.com/tinkerbell/boots/blob/main/ipxe/hook.go
 func parseCmdLine(cmdLines []string) (cfg tinkWorkerConfig) {
 	for i := range cmdLines {
-		cmdLine := strings.Split(cmdLines[i], "=")
+		cmdLine := strings.SplitN(cmdLines[i], "=", 2)
 		if len(cmdLine) == 0 {
 			continue
 		}

hook-docker/main.go

@@ -100,7 +100,7 @@ func (d dockerConfig) writeToDisk(loc string) error {
 // parseCmdLine will parse the command line.
 func parseCmdLine(cmdLines []string) (cfg tinkConfig) {
 	for i := range cmdLines {
-		cmdLine := strings.Split(cmdLines[i], "=")
+		cmdLine := strings.SplitN(cmdLines[i], "=", 2)
 		if len(cmdLine) == 0 {
 			continue
 		}