Embed the install manifests in flux binary

- add make target for generating the install manifests using kustomize
- embed the generated manifests in flux binary
- the install and bootstrap commands default to using the embedded manifests
- download the install manifests from GitHub only if the install/bootstrap version arg is set

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

docs/cmd/flux_bootstrap.md

@@ -20,7 +20,7 @@ The bootstrap sub-commands bootstrap the toolkit components on the targeted Git
       --registry string            container registry where the toolkit images are published (default "ghcr.io/fluxcd")
       --token-auth                 when enabled, the personal access token will be used instead of SSH deploy key
       --toleration-keys strings    list of toleration keys used to schedule the components pods onto nodes with matching taints
-  -v, --version string             toolkit version (default "latest")
+  -v, --version string             toolkit version, when specified the manifests are downloaded from https://github.com/fluxcd/flux2/releases
       --watch-all-namespaces       watch for custom resources in all namespaces, if set to false it will only watch the namespace where the toolkit is installed (default true)
 ```
 

docs/cmd/flux_bootstrap_github.md

@@ -76,7 +76,7 @@ flux bootstrap github [flags]
       --token-auth                 when enabled, the personal access token will be used instead of SSH deploy key
       --toleration-keys strings    list of toleration keys used to schedule the components pods onto nodes with matching taints
       --verbose                    print generated objects
-  -v, --version string             toolkit version (default "latest")
+  -v, --version string             toolkit version, when specified the manifests are downloaded from https://github.com/fluxcd/flux2/releases
       --watch-all-namespaces       watch for custom resources in all namespaces, if set to false it will only watch the namespace where the toolkit is installed (default true)
 ```
 

docs/cmd/flux_bootstrap_gitlab.md

@@ -72,7 +72,7 @@ flux bootstrap gitlab [flags]
       --token-auth                 when enabled, the personal access token will be used instead of SSH deploy key
       --toleration-keys strings    list of toleration keys used to schedule the components pods onto nodes with matching taints
       --verbose                    print generated objects
-  -v, --version string             toolkit version (default "latest")
+  -v, --version string             toolkit version, when specified the manifests are downloaded from https://github.com/fluxcd/flux2/releases
       --watch-all-namespaces       watch for custom resources in all namespaces, if set to false it will only watch the namespace where the toolkit is installed (default true)
 ```
 

docs/cmd/flux_install.md

@@ -45,7 +45,7 @@ flux install [flags]
       --network-policy             deny ingress access to the toolkit controllers from other namespaces using network policies (default true)
       --registry string            container registry where the toolkit images are published (default "ghcr.io/fluxcd")
       --toleration-keys strings    list of toleration keys used to schedule the components pods onto nodes with matching taints
-  -v, --version string             toolkit version (default "latest")
+  -v, --version string             toolkit version, when specified the manifests are downloaded from https://github.com/fluxcd/flux2/releases
       --watch-all-namespaces       watch for custom resources in all namespaces, if set to false it will only watch the namespace where the toolkit is installed (default true)
 ```