[Feature] Add support for disabling supports_block_receipts via environment variables

Description

Problem
Some blockchain nodes of specific chains return invalid data when calling the eth_getBlockReceipts method. This behavior can cause issues in the functionality of graph-node, particularly when the supports_block_receipts feature cannot be entirely disabled.

Currently, the environment variable GRAPH_ETHEREUM_BLOCK_RECEIPTS_CHECK_TIMEOUT allows configuring the timeout for block receipt checks. However, this is insufficient for completely disabling the functionality.

Proposed Solution
Introduce a new environment variable, such as GRAPH_SUPPORTS_BLOCK_RECEIPTS, to allow disabling the supports_block_receipts feature entirely by setting its value to false.

If the variable is not set, the current default behavior is preserved.
The variable would explicitly override the configuration to skip the supports_block_receipts checks.

Are you aware of any blockers that must be resolved before implementing this feature? If so, which? Link to any relevant GitHub issues.

No response

Some information to help us out

• Tick this box if you plan on implementing this feature yourself.
• I have searched the issue tracker to make sure this issue is not a duplicate.

Start by locating the configuration handling for GRAPH_ETHEREUM_BLOCK_RECEIPTS_CHECK_TIMEOUT and the supports_block_receipts checks; the issue names no files or tests. Add the proposed environment-variable override while preserving the existing default when it is unset, then verify that false skips the checks.