[8.19] Allow fleet-setup retries for all environments (elastic#240342) (elastic#240515)

# Backport

This will backport the following commits from `main` to `8.19`:
- [Allow fleet-setup retries for all environments
(elastic#240342)](elastic#240342)

<!--- Backport version: 10.1.0 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

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Allow fleet-setup retries for all environments (elastic#240342) (elastic#240486)\n\n#
Backport\n\nThis will backport the following commits from `main` to
`9.1`:\n- [Allow fleet-setup retries for all
environments\n(elastic#240342)](https://github.com/elastic/kibana/pull/240342)\n\n\n\n###
Questions ?\nPlease refer to the [Backport
tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by:
Michel Losier
<[email protected]>"}},{"branch":"8.19","label":"v8.19.6","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"9.2","label":"v9.2.1","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"url":"https://github.com/elastic/kibana/pull/240487","number":240487,"state":"MERGED","mergeCommit":{"sha":"0d770422df00dc37c4175de20b386517575245bd","message":"[9.2]
Allow fleet-setup retries for all environments (elastic#240342) (elastic#240487)\n\n#
Backport\n\nThis will backport the following commits from `main` to
`9.2`:\n- [Allow fleet-setup retries for all
environments\n(elastic#240342)](https://github.com/elastic/kibana/pull/240342)\n\n\n\n###
Questions ?\nPlease refer to the [Backport
tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by:
Michel Losier <[email protected]>"}}]}] BACKPORT-->

Author: MichelLosier

x-pack/platform/plugins/shared/fleet/server/config.ts

@@ -226,7 +226,7 @@ export const config: PluginConfigDescriptor = {
               min: 0,
             })
           ),
-          retrySetupOnBoot: schema.boolean({ defaultValue: false }),
+          retrySetupOnBoot: schema.boolean({ defaultValue: true }),
           registry: schema.object(
             {
               kibanaVersionCheckEnabled: schema.boolean({ defaultValue: true }),

x-pack/platform/plugins/shared/fleet/server/plugin.ts

@@ -735,7 +735,6 @@ export class FleetPlugin
 
     this.policyWatcher.start(licenseService);
 
-    // We only retry when this feature flag is enabled (Serverless)
     const setupAttempts = this.configInitialValue.internal?.retrySetupOnBoot ? 25 : 1;
 
     const fleetSetupPromise = (async () => {