Summary:
On ARM based MacBooks long double is 64 bits size like double.

So disabling tests that rely on greater long double range.
Jira: DB-15590

Test Plan: QLTestSelectedExpr.TestCastDecimal on Mac

Reviewers: hsunder

Reviewed By: hsunder

Subscribers: ybase, yql

Tags: #jenkins-ready

Differential Revision: https://phorge.dev.yugabyte.com/D42232