test(semver): add per-scenario subtags for granular opt-out

Adds @semver-v-prefix, @semver-partial-version and @semver-build-metadata
subtags so SDK implementations can exclude individual edge-case scenarios
during their migration period (e.g. -t 'not @semver-v-prefix'), mirroring
the pattern used by @fractional-nested.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: Simon Schrottner <simon.schrottner@dynatrace.com>

Author: aepfli

evaluator/gherkin/semver.feature

@@ -32,7 +32,7 @@ Feature: Evaluator semantic version operator
       | 3.1.0   | major |
       | 4.0.0   | none  |
 
-  @semver-edge-cases
+  @semver-edge-cases @semver-v-prefix
   Scenario Outline: v-prefix handling
     Given an evaluator
     And a String-flag with key "semver-v-prefix-flag" and a fallback value "fallback"
@@ -45,7 +45,7 @@ Feature: Evaluator semantic version operator
       | v1.0.0  | match    |
       | 2.0.0   | no-match |
 
-  @semver-edge-cases
+  @semver-edge-cases @semver-partial-version
   Scenario Outline: partial version handling
     Given an evaluator
     And a String-flag with key "semver-partial-version-flag" and a fallback value "fallback"
@@ -58,7 +58,7 @@ Feature: Evaluator semantic version operator
       | 1.0.0   | match    |
       | 2.0.0   | no-match |
 
-  @semver-edge-cases
+  @semver-edge-cases @semver-build-metadata
   Scenario Outline: build metadata ignored in comparison
     Given an evaluator
     And a String-flag with key "semver-build-metadata-flag" and a fallback value "fallback"

gherkin/targeting.feature

@@ -233,7 +233,7 @@ Feature: Targeting rules
       | 3.1.0   | major |
       | 4.0.0   | none  |
 
-  @semver @semver-edge-cases
+  @semver @semver-edge-cases @semver-v-prefix
   Scenario Outline: sem_ver v-prefix handling
     Given a String-flag with key "semver-v-prefix-flag" and a default value "fallback"
     And a context containing a key "version", with type "String" and with value "<version>"
@@ -245,7 +245,7 @@ Feature: Targeting rules
       | v1.0.0  | match    |
       | 2.0.0   | no-match |
 
-  @semver @semver-edge-cases
+  @semver @semver-edge-cases @semver-partial-version
   Scenario Outline: sem_ver partial version handling
     Given a String-flag with key "semver-partial-version-flag" and a default value "fallback"
     And a context containing a key "version", with type "String" and with value "<version>"
@@ -257,7 +257,7 @@ Feature: Targeting rules
       | 1.0.0   | match    |
       | 2.0.0   | no-match |
 
-  @semver @semver-edge-cases
+  @semver @semver-edge-cases @semver-build-metadata
   Scenario Outline: sem_ver build metadata ignored
     Given a String-flag with key "semver-build-metadata-flag" and a default value "fallback"
     And a context containing a key "version", with type "String" and with value "<version>"