[Build] Remove mentioning ./gradlew assemble to build all distributions (#116400)

This causes problems since this also includes building our wolfi image that is based on a non public available base image resulting in build failure for user without access to the docker registry.

We should avoid suggesting using ./gradlew assemble as it builds a tons of stuff unrelated to any distribution. 

Instead people should be pointed to `./gradlew localDistro`

README.asciidoc

@@ -254,11 +254,6 @@ To build a distribution for another platform, run the related command:
 ./gradlew :distribution:archives:windows-zip:assemble
 ----
 
-To build distributions for all supported platforms, run:
-----
-./gradlew assemble
-----
-
 Distributions are output to `distribution/archives`.
 
 To run the test suite, see xref:TESTING.asciidoc[TESTING].

build.gradle

@@ -13,14 +13,13 @@ import com.avast.gradle.dockercompose.tasks.ComposePull
 import com.fasterxml.jackson.databind.JsonNode
 import com.fasterxml.jackson.databind.ObjectMapper
 
+import org.elasticsearch.gradle.DistributionDownloadPlugin
 import org.elasticsearch.gradle.Version
 import org.elasticsearch.gradle.internal.BaseInternalPluginBuildPlugin
 import org.elasticsearch.gradle.internal.ResolveAllDependencies
 import org.elasticsearch.gradle.internal.info.BuildParams
 import org.elasticsearch.gradle.util.GradleUtils
 import org.gradle.plugins.ide.eclipse.model.AccessRule
-import org.gradle.plugins.ide.eclipse.model.ProjectDependency
-import org.elasticsearch.gradle.DistributionDownloadPlugin
 
 import java.nio.file.Files
 
@@ -101,7 +100,10 @@ tasks.register("updateCIBwcVersions") {
     }
   }
 
-  def writeBuildkitePipeline = { String outputFilePath, String pipelineTemplatePath, List<ListExpansion> listExpansions, List<StepExpansion> stepExpansions = [] ->
+  def writeBuildkitePipeline = { String outputFilePath,
+                                 String pipelineTemplatePath,
+                                 List<ListExpansion> listExpansions,
+                                 List<StepExpansion> stepExpansions = [] ->
     def outputFile = file(outputFilePath)
     def pipelineTemplate = file(pipelineTemplatePath)
 
@@ -132,7 +134,12 @@ tasks.register("updateCIBwcVersions") {
   // Writes a Buildkite pipeline from a template, and replaces $BWC_STEPS with a list of steps, one for each version
   // Useful when you need to configure more versions than are allowed in a matrix configuration
   def expandBwcSteps = { String outputFilePath, String pipelineTemplatePath, String stepTemplatePath, List<Version> versions ->
-    writeBuildkitePipeline(outputFilePath, pipelineTemplatePath, [], [new StepExpansion(templatePath: stepTemplatePath, versions: versions, variable: "BWC_STEPS")])
+    writeBuildkitePipeline(
+      outputFilePath,
+      pipelineTemplatePath,
+      [],
+      [new StepExpansion(templatePath: stepTemplatePath, versions: versions, variable: "BWC_STEPS")]
+    )
   }
 
   doLast {
@@ -150,7 +157,11 @@ tasks.register("updateCIBwcVersions") {
         new ListExpansion(versions: filterIntermediatePatches(BuildParams.bwcVersions.unreleasedIndexCompatible), variable: "BWC_LIST"),
       ],
       [
-        new StepExpansion(templatePath: ".buildkite/pipelines/periodic.bwc.template.yml", versions: filterIntermediatePatches(BuildParams.bwcVersions.indexCompatible), variable: "BWC_STEPS"),
+        new StepExpansion(
+          templatePath: ".buildkite/pipelines/periodic.bwc.template.yml",
+          versions: filterIntermediatePatches(BuildParams.bwcVersions.indexCompatible),
+          variable: "BWC_STEPS"
+        ),
       ]
     )