[BUG] Invalid transaction error message when payment amount exceeds gas lane limits

[devendran-m]

Description:
When submitting a WASM-based transaction with "classic" payment, if the payment-amount exceeds the highest gas lane limit, the transaction fails with a generic error message:

{"code":-32016,"message":"Invalid transaction","data":"the transaction was invalid: The transaction sent to the network was invalid for an unspecified reason"}

The current error message lacks clarity and does not explain that the failure occurs because the payment amount cannot be assigned to an existing gas lane.

Steps to Reproduce:

1. Use the following chainspec configuration:

{"era_duration":"10 minutes","gas_hold_interval":"5 minutes","enable_addressable_entity":true}

2. Submit a transaction with the following parameters:

casper-client put-transaction package \
--chain-name casper-test-jh \
-n http://172.31.27.77:7777 \
--package-address package-10314994ca14feddc562fe63c7407f750c6f81a0ced65e0e33c0ad63fcbe0281 \
--session-entry-point apple \
--payment-amount 500000000000 \
--pricing-mode classic \
--gas-price-tolerance 2 \
--standard-payment true \
--secret-key /home/ubuntu/keys/test0/secret_key.pem

3. Observe the returned error:

{"code":-32016,"message":"Invalid transaction","data":"the transaction was invalid: The transaction sent to the network was invalid for an unspecified reason"}

Expected Behaviour:
The error message should clearly explain that the transaction failed because the payment-amount exceeded the largest available gas lane.

Actual Behaviour:
A vague error message is returned, making debugging difficult

Environment Details:

casper-node: 61b78eabc52e1de3489c5652810dc030a1a5743f
casper-sidecar: 359792250d1f4d998a347546b8205cac15c86bd6
casper-client: 2e4bfcdda1d699a60183631cb619371d5c2f5d51

Related PR/Changes:
Recent change (merged on Dec 15) that modifies behavior around gas lane determination for classic payment.

Additional Context:
Reported by Jiuhong during testing. Confirmed by Jakub that the issue arises when the payment exceeds the largest gas lane limit (100000000000).

Acceptance Criteria:

• The error message clearly specifies that the payment amount exceeds the allowable gas lane limit.
• The change is reflected in casper-node and/or casper-sidecar logs and responses.
• A test case is added to verify this scenario.