Update instance type regex to also include hyphens

[nargokul]

Issue #, if available:

Updates regex patterns across the SDK to support instance types with hyphens in family names (e.g., ml.p6-b200.48xlarge).
Previously, instance type validation would fail for newer instance families that include hyphens.
Modified patterns in utils.py, fw_utils.py, estimator.py, and optimize_utils.py to include - in character classes.
Added comprehensive test coverage for hyphenated instance types across all affected modules.

https://tiny.amazon.com/1kno4b1e

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