fix(events,logs): drop outdated API from devDependencies and align types

[pichlermarc]

Which problem is this PR solving?

I saw that there's two devDependency entries old @opentelemetry/api-events and @opentelemetry/api-logs packages, which cause an old package to be present for these two packages.

The current version is actually specified as a dependency so removing the devDependency is safe.

Since the devDependency pulled in the local types, we had some type-mismatch with in @opentelemetry/sdk-logs where null was not an allowed input with the changed type.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• Existing tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.94%. Comparing base (f8ab559) to head (9a7bc19).
Report is 18 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5013      +/-   ##
==========================================
+ Coverage   93.39%   93.94%   +0.54%     
==========================================
  Files          46      310     +264     
  Lines         712     8138    +7426     
  Branches      120     1633    +1513     
==========================================
+ Hits          665     7645    +6980     
- Misses         47      493     +446     

Files with missing lines	Coverage Δ
experimental/packages/sdk-logs/src/LogRecord.ts	98.09% <100.00%> (ø)

... and 265 files with indirect coverage changes