chore: fix image build issues

[BulkBeing]

https://github.com/numaproj/numaflow-rs/actions/runs/11819933173/job/32933404680

#15 32.47    Compiling uuid v1.11.0
#15 36.96    Compiling source-transformer-event-time-filter v0.1.0 (/numaflow-rs/examples/mapt-event-time-filter)
#15 41.86     Finished `release` profile [optimized] target(s) in 41.68s
#15 DONE 42.0s

#16 [mapt-event-time-filter 2/2] COPY --from=build /numaflow-rs/target/release/mapt-event-time-filter .
#16 ERROR: failed to calculate checksum of ref 8cee6282-a9d6-484a-bc40-7902f34ccdad::l8rlhx20ui5tz7lbh86ldt9qc: "/numaflow-rs/target/release/mapt-event-time-filter": not found
------
 > [mapt-event-time-filter 2/2] COPY --from=build /numaflow-rs/target/release/mapt-event-time-filter .:
------
Dockerfile:17
--------------------
  15 |     
  16 |     # copy the build artifact from the build stage
  17 | >>> COPY --from=build /numaflow-rs/target/release/mapt-event-time-filter .
  18 |     
  19 |     # set the startup command to run your binary
--------------------
ERROR: failed to solve: failed to compute cache key: failed to calculate checksum of ref 8cee6282-a9d6-484a-bc40-7902f34ccdad::l8rlhx20ui5tz7lbh86ldt9qc: "/numaflow-rs/target/release/mapt-event-time-filter": not found
make: *** [Makefile:13: image] Error 1
Error: failed to run make image in examples/mapt-event-time-filter
Error: Process completed with exit code 1.

Tested by:

• Building all images locally ./hack/update_examples.sh --build-push-example examples/mapt-event-time-filter
• Tried running all images to ensure entry point is set correctly.

Temporarily enabled image builds for the brach without pushing: https://github.com/numaproj/numaflow-rs/actions/runs/11849802649/job/33023654421?pr=104