Add `sourceTag` to `PineconeConfiguration` and `additionalHeaders` to data plane calls #482

Job	Run time
Linting, formatting, documentation, etc	32s
testing / Run unit tests	36s
testing / TS compile (~4.1.0)	24s
testing / TS compile (~4.2.0)	23s
testing / TS compile (~4.3.0)	25s
testing / TS compile (~4.4.0)	23s
testing / TS compile (~4.5.0)	27s
testing / Example app: semantic search	1m 3s
testing / TS compile (~4.6.0)	28s
testing / TS compile (~4.7.0)	28s
testing / TS compile (~4.8.0)	25s
testing / TS compile (~4.9.0)	28s
testing / TS compile (~5.0.0)	23s
testing / Run integration tests (prod, npm, node)	6m 7s
testing / TS compile (~5.1.0)	24s
testing / TS compile (~5.2.0)	25s
testing / Run integration tests (prod, npm, edge)	6m 20s
testing / TS compile (latest)	26s
testing / Run integration tests (prod, bun, node, 1.0.0)	4m 51s
testing / Run integration tests (prod, bun, node, 1.0.5)	5m 38s
testing / Run integration tests (prod, bun, node, 1.0.10)	5m 34s
testing / Run integration tests (prod, bun, node, 1.0.15)	5m 13s
testing / Run integration tests (prod, bun, node, 1.0.20)	5m 59s
testing / Clean up integration tests	23s
	47m 45s

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