Running mypy on SDK resources

[Medinatlawal]

Part of #1608

Addressing running mypy on opentelemetry-sdk iteratively so we don't have to make one big change addressing all mypy issues at once.

[Medinatlawal]

There's still about 7 errors left on resource file that I'm stuck on, if anyone can help with some advice on how to address them or know how that address them that'd be great! Alot of the leftover errors have to do with "Type"Any"".

[emdneto]

Pasting errors here:

$ mypy --install-types --non-interactive --namespace-packages --explicit-package-bases opentelemetry-sdk/src/opentelemetry/sdk/resources

opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py:69: error: Module "opentelemetry.attributes" has no attribute "BoundedAttributes"  [attr-defined]
opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py:198: error: Expression has type "Any"  [misc]
opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py:199: error: Expression type contains "Any" (has type "Iterator[Any]")  [misc]
opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py:199: error: Expression type contains "Any" (has type "SupportsNext[Any]")  [misc]
opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py:286: error: Expression type contains "Any" (has type "dict[Any, Any]")  [misc]
opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py:373: error: Expression has type "Any"  [misc]
opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py:374: error: Expression has type "Any"  [misc]

[lzchen]

Superceded by #4053