Enable ConvMnist and Mnist integration and performance tests.

[kkeerthana0573]

Ticket

Link to Github Issue

Problem description

Re-enable ConvMnist and Mnist integration and performance tests.

What's changed

ConvMnist and Mnist integration test failed on all cards are now fixed with the latest main.

Checklist

• Post commit CI passes
• Blackhole Post commit (if applicable)
• Model regression CI testing passes (if applicable)
• Device performance regression CI testing passes (if applicable)
• (For models and ops writers) Full new models tests passes
• New/Existing tests provide coverage for changes

[saichandax]

@Sudharsan-V , @kkeerthana0573
Please post passing CI links in the description when available.

[Sudharsan-V]

Both the Nightly and Device perf CIs are successfully passing for MNIST and ConvNet MNIST.

Nightly CI Nightly CI and ttnn tests.
Device Perf Mnist, convnet_mnist
Note: Device perf CI is currently unstable. Therefore, the links for mnist and convnet_mnist have been highlighted and shared shared above

[tt-rkim]

Approving to unblock
I would recommend trying now, as device perf should be stable

[kkeerthana0573]

Passing CI links - 03.02.2025 :

• (Single-card) Nightly model and ttnn tests
• (Single-card) Device perf regressions
• (Single-card) Model perf tests

Failed on main (unrelated to this PR):
- All post-commit tests
- (Single-card) Demo tests