Move highest 38_STABLE branches up to php74

Both core and worplace branches.

src/org/moodle/ci/versions/M38.groovy

@@ -8,6 +8,7 @@ class M38 extends Version {
             "7.1",
             "7.2",
             "7.3",
+            "7.4",
         ]
         this.supportedDatabases = [
             "pgsql",

src/org/moodle/ci/versions/WP38.groovy

@@ -8,6 +8,7 @@ class WP38 extends Version {
             "7.1",
             "7.2",
             "7.3",
+            "7.4",
         ]
         this.supportedDatabases = [
             "pgsql",

test/org/moodle/ci/versions/M38.groovy

@@ -33,10 +33,10 @@ class M38 extends Specification {
         def output = moodleVersion.getPhpVersions()
 
         then:
-        assert output.sort() == ['7.1', '7.2', '7.3'].sort()
+        assert output.sort() == ['7.1', '7.2', '7.3', '7.4'].sort()
     }
 
-    def "getHighestSupportedVersion is 7.3"() {
+    def "getHighestSupportedVersion is 7.4"() {
         given:
         def moodleVersion = new org.moodle.ci.versions.M38()
 
@@ -44,7 +44,7 @@ class M38 extends Specification {
         def output = moodleVersion.getHighestSupportedVersion()
 
         then:
-        assert output == '7.3'
+        assert output == '7.4'
     }
 
     def "getLowestSupportedVersion is 7.1"() {

test/org/moodle/ci/versions/WP38.groovy

@@ -33,10 +33,10 @@ class WP38 extends Specification {
         def output = workplaceVersion.getPhpVersions()
 
         then:
-        assert output.sort() == ['7.1', '7.2', '7.3'].sort()
+        assert output.sort() == ['7.1', '7.2', '7.3', '7.4'].sort()
     }
 
-    def "getHighestSupportedVersion is 7.3"() {
+    def "getHighestSupportedVersion is 7.4"() {
         given:
         def workplaceVersion = new org.moodle.ci.versions.WP38()
 
@@ -44,7 +44,7 @@ class WP38 extends Specification {
         def output = workplaceVersion.getHighestSupportedVersion()
 
         then:
-        assert output == '7.3'
+        assert output == '7.4'
     }
 
     def "getLowestSupportedVersion is 7.1"() {