* testing/e2e: Use a separate config file for database init
The other config file contains templated parameters, which was causing
errors when loading the config file, even though the values were never
used.
* testing/e2e: add target pagination test
Exercises target pagination both over the CLI and the API. These tests
run in <10s on my machine, though they each involve creating 1000
targets (with current defaults).
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Co-authored-by: Michael Li <michael.li@hashicorp.com>