Revert "scripts/quarantine_zephyr: add arch.arm.no_optimizations for L15"

This reverts commit eb6e836.

There is no need to quartantine this anymore since the build issue
is fixed.

Signed-off-by: Georgios Vasilakis <[email protected]>

Author: Vge0rge

scripts/quarantine_zephyr.yaml

@@ -524,11 +524,3 @@
 - scenarios:
     - buildsystem.sbom.spdx
   comment: "Missing toolchain python package. https://nordicsemi.atlassian.net/browse/NCSDK-35387"
-
-- scenarios:
-    - arch.arm.interrupt.no_optimizations
-    - arch.arm.swap.common.fpu_sharing.no_optimizations
-    - arch.arm.swap.common.no_optimizations
-  platforms:
-    - nrf54l15dk/nrf54l15/cpuapp
-  comment: "https://nordicsemi.atlassian.net/browse/NCSDK-35435"