Opdata 3775 remove view function indexer result decimals

[Subarna-Singh]

Closes #OPDATA-3775

https://smartcontract-it.atlassian.net/browse/OPDATA-3775

Description

Remove viewFunctionIndexerResultDecimals input param

Changes

view-function-multi-chain queries decimals method on contract and returns value in result data

Steps to Test

yarn test packages/source/view-function-multi-chain/test

Quality Assurance

• [ ] If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant infra-k8s configuration file.
• [ ] If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant adapter-secrets configuration file or update the soak testing blacklist.
• [ ] If a new adapter was made, or a new endpoint was added, update the test-payload.json file with relevant requests.
• [ ] The branch naming follows git flow (feature/x, chore/x, release/x, hotfix/x, fix/x) or is created from Jira.
• [x] This is related to a maximum of one Jira story or GitHub issue.
• [x] Types are safe (avoid TypeScript/TSLint features like any and disable, instead use more specific types).
• [x] All code changes have 100% unit and integration test coverage. If testing is not applicable or too difficult to justify doing, the reasoning should be documented explicitly in the PR.