Bump no.nav.security:mock-oauth2-server from 0.5.7 to 2.1.4

Bumps [no.nav.security:mock-oauth2-server](https://github.com/navikt/mock-oauth2-server) from 0.5.7 to 2.1.4.
- [Release notes](https://github.com/navikt/mock-oauth2-server/releases)
- [Commits](navikt/mock-oauth2-server@0.5.7...2.1.4)

---
updated-dependencies:
- dependency-name: no.nav.security:mock-oauth2-server
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle.kts

@@ -71,7 +71,7 @@ dependencies {
     testImplementation(libs.testcontainer.postgresql)
     testImplementation("org.testcontainers:kafka:1.17.6")
     testImplementation("org.apache.kafka:kafka-streams-test-utils:3.3.1")
-    testImplementation("no.nav.security:mock-oauth2-server:0.5.7")
+    testImplementation("no.nav.security:mock-oauth2-server:2.1.4")
 
     testImplementation(libs.mockk)