Add receiver of kotlin.text.toPattern to standard Kotlin injections

#KT-39231 Fixed

idea/resources/injection/kotlinInjections.xml

@@ -8,5 +8,8 @@
         <place><![CDATA[
             receiver().ofFunction(kotlinFunction().withName("toRegex").withReceiver("kotlin.String").definedInPackage("kotlin.text"))
             ]]></place>
+        <place><![CDATA[
+            receiver().ofFunction(kotlinFunction().withName("toPattern").withReceiver("kotlin.String").definedInPackage("kotlin.text"))
+            ]]></place>
     </injection>
 </component>

idea/tests/org/jetbrains/kotlin/psi/KotlinStdlibInjectionTest.kt

@@ -55,6 +55,20 @@ class KotlinStdlibInjectionTest : AbstractInjectionTest() {
         RegExpLanguage.INSTANCE.id
     )
 
+    fun testToPattern0() = assertInjectionPresent(
+        """
+            val test = "a.*b<caret>".toPattern()
+            """,
+        RegExpLanguage.INSTANCE.id
+    )
+
+    fun testToPattern1() = assertInjectionPresent(
+        """
+            val test = "a.*b<caret>".toPattern(java.util.regex.Pattern.CASE_INSENSITIVE)
+            """,
+        RegExpLanguage.INSTANCE.id
+    )
+
     private fun assertInjectionPresent(@Language("kotlin") text: String, languageId: String) {
         doInjectionPresentTest(text, languageId = languageId, unInjectShouldBePresent = false)
     }