CR: Hosts that have a strata hotel PR exemption - document upload requirements change

**Description:**
We want to make registering/renewing easier for hosts of units located in a strata-hotel building. The onus to prove that a building is a strata-hotel should be on the strata-hotel STR management.

**What is the current behaviour:**
When a host claims PR exemption: Strata-Hotel, they are required to upload documents to prove that the building where their STR unit is located is a strata-hotel
If an STR is located in an area with a BL requirement, the host is not prompted to upload a BL doc sometimes; depending on options selected.

**What is the desired behaviour:**
For all hosts claiming a PR exemption due to a strata hotel (not matter what category was chosen):
Change 'Step 3 - Add Supporting Information' of the application/renewal process:
Make the 'Supporting strata-titled hotel or motel documentation' field optional
Always include an optional field for hosts to upload business license document

## Acceptance Criteria
> Generated by [Zenhub AI](https://www.zenhub.com/ai)

### Acceptance Criteria

**Scenario 1: Strata-titled hotel documentation is optional**
- **Given** a host is in the application or renewal process
- **And** the host has selected a Principal Residence (PR) exemption for a "Strata-titled hotel or motel"
- **When** the host reaches "Step 3 - Add Supporting Information"
- **Then** the "Supporting strata-titled hotel or motel documentation" upload field should be displayed
- **And** the field should be marked as optional, allowing the host to proceed without uploading a file

**Scenario 2: Business license document field is always visible and optional**
- **Given** a host has claimed a PR exemption due to a strata hotel
- **When** the host views "Step 3 - Add Supporting Information"
- **Then** the "Business license document" upload field must be visible regardless of the category or location-based BL requirements selected previously
- **And** the field should be marked as optional

**Scenario 3: Successful progression without document uploads**
- **Given** a host is on "Step 3 - Add Supporting Information" for a strata-hotel exemption
- **When** the host leaves both the strata documentation and the business license fields empty
- **And** the host clicks the button to proceed to the next step
- **Then** the system should allow the host to advance without any validation errors or "required field" prompts for these documents

**Scenario 4: Consistent behavior across all strata-hotel categories**
- **Given** a host selects any category that qualifies for a strata-hotel PR exemption
- **When** navigating the registration or renewal flow
- **Then** the document requirements in Step 3 must consistently show both the strata documentation and business license fields as optional components