observability: please update to a newer version of opentelemetry because the current dependency opentelemetry-api:1.1.0 is from April 2021 (3+ years ago)

[odeke-em]

While working on modernizing the observability in this library I encountered the fact that the constrained minimum version of opentelemetry-api being used is 1.1.0 and that was released in April 2021 (3 years ago) https://pypi.org/project/opentelemetry-api/1.1.0/
per

python-spanner/setup.py

Lines 49 to 53 in fe20d41

	"tracing": [
	"opentelemetry-api >= 1.1.0",
	"opentelemetry-sdk >= 1.1.0",
	"opentelemetry-instrumentation >= 0.20b0, < 0.23dev",
	],

Let's get to the latest release of opentelemetry. I am going to send a change