Enable a few more Guava Primitives tests for J2KT

- some Base regex helpers have become available for J2KT since last iteration. Thanks cpovirk@ for pointing this out
- there was a transpiler improvement:

  `GREATEST - (short) 1` is a compile time constant in Java and can be used to
  initialize a `short` because the compiler can verify that the value is small
  enough. The straight-forward translation `GREATEST - 1.toShort()` is not a
  compile time constant in Kotlin and cannot be used to initialize a `Short`. The
  transpiler handles this now

RELNOTES=n/a
PiperOrigin-RevId: 611467476

core/src/main/java/com/google/common/truth/StringSubject.java

@@ -165,7 +165,6 @@ public void doesNotMatch(@Nullable String regex) {
 
   /** Fails if the string matches the given regex. */
   @GwtIncompatible("java.util.regex.Pattern")
-  @J2ktIncompatible
   public void doesNotMatch(@Nullable Pattern regex) {
     checkNotNull(regex);
     if (actual == null) {
@@ -177,7 +176,6 @@ public void doesNotMatch(@Nullable Pattern regex) {
 
   /** Fails if the string does not contain a match on the given regex. */
   @GwtIncompatible("java.util.regex.Pattern")
-  @J2ktIncompatible
   public void containsMatch(@Nullable Pattern regex) {
     checkNotNull(regex);
     if (actual == null) {
@@ -199,7 +197,6 @@ public void containsMatch(@Nullable String regex) {
 
   /** Fails if the string contains a match on the given regex. */
   @GwtIncompatible("java.util.regex.Pattern")
-  @J2ktIncompatible
   public void doesNotContainMatch(@Nullable Pattern regex) {
     checkNotNull(regex);
     if (actual == null) {