fix(airflow): prioritize conn_type over id-based type inference

[hsheth2]

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

[github-actions]

Unit Test Results (metadata ingestion)

       8 files         8 suites   57m 19s ⏱️
   692 tests    689 ✔️ 3 💤 0 ❌
1 384 runs  1 378 ✔️ 6 💤 0 ❌

Results for commit 624eebe.

[github-actions]

Unit Test Results (build & test)

571 tests  ±0   571 ✔️ ±0   14m 56s ⏱️ +18s
141 suites ±0       0 💤 ±0 
141 files   ±0       0 ❌ ±0 

Results for commit 624eebe. ± Comparison against base commit db37dd2.

[treff7es]

lgtm