fix: respect supress_instrumentation functionality in sqlalchemy instrumentation

[marcm-ml]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes #3454

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Run this file via uv with my changes, i.e. uv sync && uv run reproduce.py

# /// script
# requires-python = ">=3.12"
# dependencies = [
#     "opentelemetry-api",
#     "opentelemetry-sdk",
#     "sqlalchemy",
# ]
# ///

from sqlalchemy import create_engine

from opentelemetry import trace
from opentelemetry.instrumentation.sqlalchemy import SQLAlchemyInstrumentor
from opentelemetry.instrumentation.utils import suppress_instrumentation
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import (
    ConsoleSpanExporter,
    SimpleSpanProcessor,
)

tracer_provider = TracerProvider()
tracer_provider.add_span_processor(SimpleSpanProcessor(ConsoleSpanExporter()))
trace.set_tracer_provider(tracer_provider)

tracer = trace.get_tracer(__name__)

engine = create_engine("sqlite:///:memory:")
SQLAlchemyInstrumentor().instrument(engine=engine)

# creates span
with engine.connect():
    pass

# no span
with suppress_instrumentation(), engine.connect():
    pass

Does This PR Require a Core Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated (no need)

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: marcm-ml / name: Marc (fc186af, c065481, 1889fb2, 4513f66, 388eccb)
• ✅ login: emdneto / name: Emídio Neto (2cbec3e)
• ✅ login: xrmx / name: Riccardo Magliocchetti (0f997c6)

[marcm-ml]

I have updated the changelog after release. Can you re-review?

[tammy-baylis-swi]

Thanks again!

[marcm-ml]

@shalevr give me a ping here if we are able to merge this, then I (or you) will update the changelog conflicts.