Update ktlint version to 1.2.1 for Spotless 8.9.0 compatibility

Updated ktlint to 1.2.1 across AccessibilityCodelab, AdvancedStateAndSideEffectsCodelab, BasicLayoutsCodelab, MigrationCodelab, NavigationCodelab, TestingCodelab, and ThemingCodelab build files.

Reason:
Spotless plugin 8.9.0 requires a modern ktlint version (1.2.1). The previous ktlint versions (0.45.2-0.48.2) produced InvocationTargetException errors during spotlessCheck and spotlessApply.

Author: srikrishnasakunia

AccessibilityCodelab/build.gradle

@@ -44,7 +44,7 @@ subprojects {
             targetExclude("$buildDir/**/*.kt")
             targetExclude('bin/**/*.kt')
 
-            ktlint("0.45.2").userData([android: "true"])
+            ktlint("1.2.1")
             licenseHeaderFile rootProject.file('spotless/copyright.kt')
         }
     }

AdvancedStateAndSideEffectsCodelab/build.gradle

@@ -43,7 +43,7 @@ subprojects {
             target '**/*.kt'
             targetExclude("$buildDir/**/*.kt")
             targetExclude('bin/**/*.kt')
-            ktlint("0.45.2")
+            ktlint("1.2.1")
             licenseHeaderFile rootProject.file('spotless/copyright.kt')
         }
     }

BasicLayoutsCodelab/build.gradle

@@ -42,7 +42,7 @@ subprojects {
             targetExclude("$buildDir/**/*.kt")
             targetExclude('bin/**/*.kt')
 
-            ktlint("0.45.2").userData([android: "true"])
+            ktlint("1.2.1")
             licenseHeaderFile rootProject.file('spotless/copyright.kt')
         }
     }

MigrationCodelab/build.gradle

@@ -45,6 +45,6 @@ spotless {
         target "**/*.kt"
         targetExclude("$buildDir/**/*.kt")
         targetExclude('bin/**/*.kt')
-        ktlint("0.46.1")
+        ktlint("1.2.1")
     }
 }

NavigationCodelab/build.gradle

@@ -44,7 +44,7 @@ subprojects {
             targetExclude("$buildDir/**/*.kt")
             targetExclude('bin/**/*.kt')
 
-            ktlint("0.46.1")
+            ktlint("1.2.1")
             licenseHeaderFile rootProject.file('spotless/copyright.kt')
         }
     }

TestingCodelab/build.gradle

@@ -71,7 +71,7 @@ subprojects {
             targetExclude("$buildDir/**/*.kt")
             targetExclude('bin/**/*.kt')
 
-            ktlint(rootProject.ktlintVersion)
+            ktlint("1.2.1")
             licenseHeaderFile rootProject.file('spotless/copyright.kt')
         }
     }

ThemingCodelab/build.gradle

@@ -44,7 +44,7 @@ subprojects {
             targetExclude("$buildDir/**/*.kt")
             targetExclude('bin/**/*.kt')
 
-            ktlint("0.45.2")
+            ktlint("1.2.1")
             licenseHeaderFile rootProject.file('spotless/copyright.kt')
         }
     }