scylla 4.19.0.8/9: drop release: prefix in getCcmVersionString()

The getCcmVersionString() method in the scylla-java-driver source at tags
4.19.0.8 and 4.19.0.9 returns "release:" + versionString when the backend
is Scylla. This causes CCM to attempt a remote download instead of using
the locally-installed package, producing 105+ cluster creation failures
per test run.

Add a patch hunk to drop the prefix, following the same pattern used in
versions/scylla/4.18.1.0/patch.

Author: nikagra

versions/scylla/4.19.0.8/patch

@@ -529,7 +529,18 @@ index e7b2b4e4a..a4b2ecea7 100644
    }
 
    // Copied from Netty's PlatformDependent to avoid the dependency on Netty
-@@ -503,7 +506,18 @@ public class CcmBridge implements AutoCloseable {
+@@ -343,7 +346,9 @@
+       if (shouldReplace) {
+         versionString = versionString.replace(".0-", ".");
+       }
+-      return "release:" + versionString;
++      // Dropping "release:" prefix so CCM uses the locally-installed Scylla package instead of
++      // attempting to download from S3. See versions/scylla/4.18.1.0/patch for the same fix.
++      return versionString;
+     }
+     // for 4.0 or 5.0 pre-releases, the CCM version string needs to be "4.0-alpha1", "4.0-alpha2" or
+     // "5.0-beta1" Version.toString() always adds a patch value, even if it's not specified when
+ @@ -503,7 +506,18 @@ public class CcmBridge implements AutoCloseable {
    }
 
    public void addWithoutStart(int n, String dc) {

versions/scylla/4.19.0.9/patch

@@ -207,7 +207,18 @@ index e7b2b4e4a0..8fbbed8d95 100644
    }
 
    // Copied from Netty's PlatformDependent to avoid the dependency on Netty
-@@ -503,7 +509,18 @@ public class CcmBridge implements AutoCloseable {
+@@ -343,7 +346,9 @@
+       if (shouldReplace) {
+         versionString = versionString.replace(".0-", ".");
+       }
+-      return "release:" + versionString;
++      // Dropping "release:" prefix so CCM uses the locally-installed Scylla package instead of
++      // attempting to download from S3. See versions/scylla/4.18.1.0/patch for the same fix.
++      return versionString;
+     }
+     // for 4.0 or 5.0 pre-releases, the CCM version string needs to be "4.0-alpha1", "4.0-alpha2" or
+     // "5.0-beta1" Version.toString() always adds a patch value, even if it's not specified when
+ @@ -503,7 +509,18 @@ public class CcmBridge implements AutoCloseable {
    }
 
    public void addWithoutStart(int n, String dc) {